From 74c82056c966b9e3cf39d427cd6ea99a887277ec Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Fri, 28 Feb 2020 12:31:02 +0100
Subject: [PATCH] lcov: Support gcc 9

https://github.com/linux-test-project/lcov/issues/58
https://github.com/Homebrew/homebrew-core/pull/50070
---
 .../tools/analysis/lcov/default.nix           | 19 +++++++++++++++++--
 pkgs/top-level/perl-packages.nix              | 15 +++++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/tools/analysis/lcov/default.nix b/pkgs/development/tools/analysis/lcov/default.nix
index 06c712588f8f..a5e8c81e313a 100644
--- a/pkgs/development/tools/analysis/lcov/default.nix
+++ b/pkgs/development/tools/analysis/lcov/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, perl}:
+ {stdenv, fetchurl, fetchpatch, perl, perlPackages, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "lcov-1.14";
@@ -8,13 +8,28 @@ stdenv.mkDerivation rec {
     sha256 = "06h7ixyznf6vz1qvksjgy5f3q2nw9akf6zx59npf0h3l32cmd68l";
   };
 
-  buildInputs = [ perl ];
+  patches =
+    [ (fetchpatch {
+        url = https://github.com/linux-test-project/lcov/commit/ebfeb3e179e450c69c3532f98cd5ea1fbf6ccba7.patch;
+        sha256 = "1z9jfqpj34jnzdvmqr5fs8hl56bvbwd8xhlbg3chcswbjj97vk7l";
+      })
+      (fetchpatch {
+        url = https://github.com/linux-test-project/lcov/commit/75fbae1cfc5027f818a0bb865bf6f96fab3202da.patch;
+        sha256 = "1wgd4y7vhvfnxyhdd0z2pi9ys6l0z88f14i69a7prb296m1zwg5j";
+      })
+    ];
+
+  buildInputs = [ perl makeWrapper ];
 
   preBuild = ''
     patchShebangs bin/
     makeFlagsArray=(PREFIX=$out LCOV_PERL_PATH=$(command -v perl))
   '';
 
+  postInstall = ''
+    wrapProgram $out/bin/lcov --set PERL5LIB ${perlPackages.makeFullPerlPath [ perlPackages.PerlIOgzip perlPackages.JSON ]}
+  '';
+
   meta = with stdenv.lib; {
     description = "Code coverage tool that enhances GNU gcov";
 
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 57f24021739f..903d4e40f54b 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -14630,6 +14630,21 @@ let
     };
   };
 
+  PerlIOgzip = buildPerlPackage {
+    pname = "PerlIO-gzip";
+    version = "0.20";
+    src = fetchurl {
+      url = "mirror://cpan/authors/id/N/NW/NWCLARK/PerlIO-gzip-0.20.tar.gz";
+      sha256 = "4848679a3f201e3f3b0c5f6f9526e602af52923ffa471a2a3657db786bd3bdc5";
+    };
+    buildInputs = [ pkgs.zlib ];
+    NIX_CFLAGS_LINK = "-L${pkgs.zlib.out}/lib -lz";
+    meta = {
+      description = "Perl extension to provide a PerlIO layer to gzip/gunzip";
+      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
+    };
+  };
+
   PerlIOutf8_strict = buildPerlPackage {
     pname = "PerlIO-utf8_strict";
     version = "0.007";